How it works

What it does

Film a whole range session. Impact Reel finds each ball strike, checks the picture for movement around it, and cuts a short clip for every swing. You look over the clips, set how much to keep around impact, name them and save them to a Photos album.

How it finds swings

• Automatic detection. Impact Reel finds the moment of each ball strike in your video.
• A motion and body check. Movement in the picture around each impact, and whether the golfer's hands fall from a backswing to the strike (found on your iPhone from the golfer's body points), set aside clips that are probably not swings: practice swings, walking, a neighbor's strike. It only sets clips aside; nothing is ever deleted.
• Likely and Uncertain. Confident clips are in Likely. The rest wait in Uncertain, best guesses first and crossed out, so one tap rescues a real swing.
• It learns from you. Removing a clip teaches the app what you want. This stays on your phone.
• A second look. Once the list is up, the app re-checks spots where a louder sound hid a swing and adds any it confirms, in video order, while a short line at the top of the screen counts them.
• The golfer's movement, in short videos. In a video up to a minute long, the app also watches the golfer's body through the whole video, a few times a second, to find swings the sound missed: a muffled strike, a video with no sound, two swings close together. A swing found only this way waits in Uncertain, unless the video has nothing else.
• Slow-motion videos. A video that was exported or shared already slowed down is recognized by its sound and analyzed in real time, so clips keep their real length; a notice on the Review screen lets you analyze it again at normal speed.
• Upright, whatever way you held the phone. A video filmed sideways or upside down is turned upright for you, with Undo.

Record a session

• Film in the app. Tap Record a session on the first screen to film your range session with the camera at the highest frame rate your iPhone offers (then the highest resolution at that rate). The microphone records the sound, which is how each strike is found. A short tips page shows how to set the phone down the line, behind the ball, so the camera looks through the ball and then at the target.
• Kept in Photos. When you stop, the whole recording is saved to your Photos library and added to the album your clips go to, then its swings are found like any other video. Nothing is sent anywhere.
• A dark screen while you film. The screen goes dark and the camera picture is not drawn, to save battery and keep the phone cooler; tap it to see the camera for a few seconds.

Mark up, practice and share

• Lines and rings. A shaft start line, foot line, head ring, a vertical line and your own lines, placed from the video or by hand, each with its own color, width and ends.
• Shot tracer. A tracer you draw from the ball, through two frames just after impact, to the apex and the landing. It follows the frames you marked, with three speed bars, its own look and a landing effect.
• Zoom, slow motion and frame steps on one screen, with undo and redo.
• Swing Sequence. Twelve pictures of one swing, from address to finish (P1 to P10, plus a picture before and one after impact), each in a 4:5 shape. Save them as twelve photos or as one square image, in the same Photos album as your clips.
• Export and share. Save a clip with the markup in it, or a clean-then-lines replay, or share a clip straight from the player to a student or a coach. A clip you have drawn on shows its markup on its picture in the list.
• Coming later: Range mode. A future version will use the camera to catch each swing live and show a replay with markup. (Record a session, which films your session in the app and finds the swings afterwards, is already here.)
• Lines, rings and tracers are visual aids, not measurements.

What you control

• Seconds before and after impact for all clips or one at a time, in half-second steps.
• Clip names (numbers are added) and the Photos album the clips go to: by default each session gets its own album, named from your clip name and the date.
• Sensitivity: Low, Default or High, and whether to look for videos saved already in slow motion.
• Preview any clip before saving, cross out clips, or export a single clip.

Quality

Export is lossless: a plain clip is cut straight from your original video with no re-encoding, so quality and resolution are untouched and every clip matches your original. A clip with slow motion or lines in it is rendered fresh at the highest quality.

Privacy

Videos are analyzed on your iPhone. There is no account, no advertising, no analytics and no tracking. Read the privacy policy.

Requirements and price

An iPhone running iOS 17 or later. Impact Reel is sold through the App Store as a one-time purchase: $9.99. No subscription and nothing else to buy. It works best with iPhone video filmed close to the golfer.

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